Pipe-cutter



I. W. NONNEMAN.

PIPE CUTTER.

APPLICATION FILED DEC-2, I918.

Patented Oct. 25, 1921.

3 SHEETS-SHEET I.

I. W. NONNEMAN.

PIPE CUTTER.

APPLICATION FILED 050.2. 191's.

Patented Oct. 25, 1921.

l. W. NONNEMAN.

PIPE CUTTER.

APPLICATION FILED DEC-2. 191a.

Patented 001;. 25, 1921.

'3 SHEETS-SHEET 3.

JNl E/v/(JE/ 5y mm WM,

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IRA w. nonivniuan, or WARREN, 01110, sssienon TO THE BORDEN COMPANY, OF

WARREN, OHIO, A CORPORATION OF OHIO.

PIPE-CUTTER.

To all whom it'mag concern:

Be it known that 1, TBA W. NONNEMAN, a citizen of the United States, residingat Warren, in the county of Trumbull'and State of Ohio, have invented a certain new and useful Improvement in Pipe-Cutters, of which the following is a full, clear, and exact description reference being had to the accompanying drawings. v

This invention relates to pipe cutters of the type wherein the cutting members are carried by an annular rotary frame adapted to surround the pipe, and an oscillatory feeding device is provided ,to rotate the frame step by step. The general object of the invention is to provide a cutting tool of this type which shall be simple, effective" and durable. More specifically, among'the objects of the inventionmay be mentioned :provision for readily disconnecting the frame to allow it to be passed laterally over an intermediate portion of a pipe; provision:

for efiectively andwquickly anchoring the pivot of the oscillating member to pipesof various sizes, and provision for the qulck and definiteladjustment of theknives for the different sizes of pipe.

The invention is hereinafter more fully described in connection with. an approved embodiment thereof'shown inthe drawings. In these drawings, Figure 1 is a'front elevation of the pipe cutter; Fig. '2 is arear elevation thereof; Fig.3 is a radial section through one of theknife housings showing a knife in cuttingengagement with aportion of pipe; Fig. 4 is a transverse section through one of the knife housings on'the broken line 4-4 ofhFig. 3, showing one of,

theframe sections, principally in plan; Fig. 5is a detail of'the'block carrying the-ratchet pawl for feeding the cutter, Fig.6 is an edge view of the oscillatory feeding handle; Fig. 7 is'a detail of the chain-anchorages connected with theoscillatory lever; .Fig. 8 is a radial section of theIrota-ry, frame.

Referring to. the various parts by 'nu morals, 10, 11', '12 and 13"indicajte fOiirT sections of theannular rotaryfframeu, Each of these'section's is correspondingly arcuate for a distance of ninety degrees so that-when the four sections abut acompleteannular ring is made. In use the four sections are rigidly connected together. The means shown for this purpose comprises links '20 extending across the meeting ends of three Specification of Letters Patent.

of the sections and pivotally connected with them and a bolt 25 and nut 26 connecting together the other two meeting ends of the sections. The removal of the nut 26 enables the separations of the sections and 13 and the whole frame then becomes articulate and can then be swung open, enabling it to be passed across a pipe where it is impracticable to pass the tool over the end of the pipe.

Referring more specifically to the frame shown, each section comprises a cylindrically arcuate portion 15 having an edge flange 16 terminating at each end in eyes. All of these edges but one have their holes parallel with the cutter axis, as illustrated at 17. The remaining eye 18 has its hole tangen tlal. The links 20 are arranged in pairs on opposite sides of these eyes 17 and are pivotally connected thereto by bolts 22 which pass through the links and intermediate eye. The bolt 25 has a bifurcated end 27 which embraces the eye 17 on the section 13 and'this boltv passes loosely through the eye 181011 the section 10. When the nut 26 is in place and screwed up tight the four sections tightly abut each other, and the frame operates as a'rigid unit. i

. Centrally formed. on each frame section is a radial boss "19 preferably integral with the frame portions 15 and 16 and having a radial groove with undercut sidesthese grooves providing ways for the cutter housings. The cutter housings are designated 30. They are-.boX-like devices carrying the knives 40 by means hereinafter specifically described, and they have ribs 31 on their backs which slidably occupy the ways in the frame members. Each rib has a series of ratchet teeth 32 inits rear face, and coactrecesses in the bosses19 and pressed toward the housings .bysprings 51 secured to the rear face of the bosses.

'The' ratchet connection described enables the housings to bereadily adjusted for different sizes of pipe, it being only necessary to 'push the housings radially inward to adjust the cutter from the largest size of pipe to the smallest. In Figs. 1 and 2, A indicates the outside diameter of the largest size of pipe and A the outside diameter of the smallest size with which the particular tool shown cooperates. The ratchet adjustment described may readily have the teeth 32 so spaced (for instance one-eighth of an inch apart) that the knives may be set for all standard sizes of pipes by simply pushing in the housings. To adjust the housings outwardly the spring 51 is pried back and the housing and its rib slid outwardly.

The knife housing is a rectangular boxlike structure having a rigid back plate 83 and rigid side walls 34, aremovable outer end 36 and a removable front plate 37, the end and front plates being normally rigidly secured by screws. Within the housing is a block 45 somewhat shorter than the interior of the housing so that it is capable of radial adjustment therein, but guided by the side walls and front and back of the housing. To the face of this block is secured the knife or cutter 40 by screws 41. The cutter is preferably of the type havinga cutting edge 4 3 and an abutment shoulder t-i in advance of such edge engaging the pipe and limiting the cut. This cutter freely occupies an opening 38 in the housing cover plate.

Within the block is a central radial recess- 46which is occupiedby a compression pring 47 hearing at its opposite ends against the base of therecess and the end cover 36 of the'housing. To retain the block within the cutter housing I provide the bolt 48 whiclr extends within the bore 46 and screws into the base of the block and extends out through the end plate 36 of the housing.

place by a screw. These blocks are adapted.

to engage the pipe and provide an effective guide for the tool.

Referring to Figs. 2, 5, 6 7,160 indicates the oscillatory lever for feeding the cutterframe. This lever is pivoted at 61 to a ,block62 which has two pairs of cars 63 and 6% Pivotally connected with'these twoears areblocks 65 and 66. Theblock 65 isbifu'rcated to provide an anchorage for a chain 7 0. Theother end of the chain has connects ed to it a bolt 67, which passes through an eye 68 on the block 66 and receives a nut 69; By tightening this nut the chain anchored at may be drawn snugly about a pipe and clamp the pivot block 62 thereto. For different size pipes it is only necessary to hang different links of the chain in the bifurcated anchor block 65.

The oscillatory lever 60 is located in position alongside of the rear face of the cutter frame. This lever has at its outer end ,a socket 75 into which an ordinary operating handle 76may be screwed. The lever is connected by a link 73 with a pawl carrier 80 31 is provided at its in-' which carries a pawl 86 adapted to engage a ratachet wheel 90 rigid with the cutter frame. Accordingly the oscillation ofthe handle 7 6 may feed the pawl back and forth and thus give a ratchet feed to the cutter. This feed is varied according to the power required by varying the position of the pivot 7 8 of the link in a slot 7 9 in the lever.

The ratchet wheel referred to is preferably an integral part of the cutter frame, each section of which carries at its rear face an arcuate overhanging rib 90 having ratchet teeth 91 on itsouter face, these ribs abutting to make a complete ratchet wheel 7 able gib 83 is secured to this flange and occupies the groove 93, thus securing the pawl carrier in place while allowing the free circumferential movement ratchet wheel.

concentric of the V Outside of the ratchet wheel the pawl carrier has formed on its side a tubular'housing 85 which carries the pawl 86. This pawl is surrounding the stem of thepawl and bearmg against 1ts head at one'end,at its other endbearmg against the bushmg 88 screwed into the housing. The'housing has an ear 89 with which the link 73 from the oscillating lever connects.

pressed inwardlyby a compression spring 87 When the frame has been placed about the pipe, the sections being rigidly held by the tightened nut 26,and the pivot block for the lever 60 being rigidly clampedtothe pipe by tightening the nutv 69 and the link 73-properly connected to the lever, and the housings pushed in until the knives abut the pipe, thedevice is ready for operation} The oscillation of the handle 7 6 gradually feeds the frame around. the springs feedingthe cutters into the pipe as the cutting pro gresses. Y

It will be seen that my cutting tool is simQ ple in construction, is readily separable, both as to the cutter frame and as to the. anchorage;

forthe oscillatory mechanism, so that it may be placed laterally on pipes, and is adjust z 120 able for different sizes of pipes :simply by pushing in the housings and placingadifi'erent link of thechain-in its anchorage block. When connected, the adjustable step by step feeding mechanism gives the desired power for turning the frame, while the springs'in the housings automatically takecare of the.

cutting feed.

Having thus described my'invention what I claim is 1. The combination of a set of arcuate.

sections all of them except the extreme sections hinged together to make an openable frame, means for removably securing the extreme sect-ions together to make the frame continuously annular, radial guideways carried by the sections, housings having ribs occupying the guideways, ratchet teeth on said ribs, pawls therefor carried by the sections, slidable blocks in the housings, knives carried by said blocks, and springs pressing the blocks inwardly.

2. An articulated annular frame made up of a series of arcuate sections hinged together, means for securing the free ends of the extreme sections together, radial ways carried by the sections, housings having ribs extending outwardly from the back thereof and guided in said ways, ratchet teeth preventing the outward movement of the housings while allowing an inward movement, spring pressed blocks carried by the hous ings, and knives carried bythe blocks.

3. In a pipe cutter, the combination of an articulated frame composed of arcuate sec tions hinged together, means for securing the ends of the extreme sections together to make an annular frame, each section carrying a segment of a ratchet wheel which becomes complete when the frame is annular, an arcually movable carrier having an adjustably mounted pawl adapted to coa-ct with such ratchet wheel, whereby the length of feeding stroke may be varied without varying the motion ofthe lever, means for moving the carrier, and cutters carried by the frame. 7 V

4. The combinationof a frame composed of a pluralityof arcuate sections hinged together, means for securing together the free ends of the extreme sections, an arcuate rib carried by each section, said rib having ratchet teeth on its outer face and a groove on its inner face, a pawl carrier adapted to lie alongside of said ratchet rib, said carrier having a gib occupying the internal groove, a pawl mounted on said carrier and adapted to engage with the ratchet teeth, and means for reciprocating the carrier.

5. The combination with an annular frame, of knives carried thereby, an annular row of ratchet teeth carried by the frame, a pawl coacting with the ratchet teeth, an oscillating lever linked with said pawl, a block to which the inner end of the lever is pivoted, means for anchoring one end of a chain to said block, and means adjustably connecting the block with the other end of the chain for tightening the chain about the pipe.

6. The combination with anannular frame, of a knife carried thereby, mechanism for rotating the frame, a block to which a portion of said mechanism is pivoted, a bifurcated block connected to the pivot block mentioned, a block connected to the other side of said pivot block and having an eye, a chain adapted to be anchored in said bifurcated block and extend around the pipe, and a bolt secured to the other end of the chain and adapted to extend through said eye and provided with a nut pulling on the chain.

7. The combination with an articulated annular frame composed of sections hinged together (the free ends of the extreme sections being removably connected together), knives carried by different sections, an annular row of ratchet teeth carried by the frame and composed of ratchet ribs on the respective sections, a pawl carrier arcually slidable about said ribs, a pawl mounted in the carrier and adapted to coact with said ratchet teeth, an oscillating lever linked with said pawl carrier, a block to which the inner end of the lever is pivoted, a bifurcated block pivoted to the pivot block mentioned, a block pivoted to the other side of the pivot block and having an eye, a chain adapted to be anchored in said bifurcated block and extend around the pipe,and means extending through said eye and adapted to pull on the chain.

In testimony whereof, I hereunto affix my signature.

IRA W. NONNEMAN. 

